Display screen or portion thereof with transitional graphical user interface



FIG. 1 is the first image in a sequence for a display screen or portionthereof with transitional graphical user interface showing our newdesign;

FIG. 2 is the second image thereof;

FIG. 3 is the third image thereof;

FIG. 4 is the fourth image thereof;

FIG. 5 is the fifth image thereof;

FIG. 6 is the sixth image thereof; and,

FIG. 7 is the seventh image thereof.

The outer perimeter shown in broken line in the drawings illustrates adisplay screen or portion thereof and forms no part of the claimeddesign. The remaining broken lines in the drawings illustrate portionsof the transitional graphical user interface that form no part of theclaimed design.

The appearance of the transitional graphical user interface sequentiallytransitions between the images shown in FIGS. 1-7. The process or periodin which one image transitions to another image forms no part of theclaimed design.

CLAIM The ornamental design for a display screen or portion thereof withtransitional graphical user interface, as shown and described.